That's a good idea! I use good 'ol Japanese NGK BPMR7A plugs. What's the code number of the NGK iridium plug that you use for your Radne Racket 120 engine?
I carry a couple of plugs and a plug spanner in the back of the harness, and have to swap plugs if I flood the engine trying to start it.

My starting technique is throttle closed, choke open, jab the starter a couple of times until the engine kicks over. Then choke OFF and quarter throttle. Usually she'll start easily. If she doesn't, I close the throttle and open the choke again. I never open the choke AND the throttle as this floods the engine really easily.
If you have a preferred technique that works really well for you, then let us know.